yes i did mean 3oz to a gallon.....did you guys have similar problems?my buddy is flying a DA w/ the same oil brand and he is mixing 50:1....are the newer 3w's an oil eater?also......if i were low on oil content...wouldnt the problem be evident even when first running the engine....it seems i cant get past a half a tank before the problem occurs....Thanks for the inputs,keep them coming,i am going to call AI tomorrow and tell them the problems i am having....any comments on the Tilliston Carb????